This device is a game changer for wine sales people. It looks great , travels well, easy to use and durable. Greatly helps me reduce my sampling costs. However, and I almost gave it four stars for this but it wouldn't be totally fair , after more than 5/7 inserts of the needle in a bottle, I notice a distinct deterioration ( oxidized quality) of the sample bottle. I believe after repeated punctures, the cork cannot keep resealing itself. Also, would be very helpful if cost of gas canisters came down on multi canister purchases. It gets mildly cost prohibitive to keep spending $10 on each. Happy to buy 4 at a time for a discount. Other than that very satisfied and recommend to my " well-funded " on premise accts.